<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>何为数据代理</title>
    </head>
    <body>
        <!-- 数据代理：通过一个对象代理另一个对象中属性的操作(读/写) -->
        <script type="text/javascript">
            let obj = { x: 10 };
            let obj2 = { y: 200 };

            Object.defineProperty(obj2, 'x', {
                get() {
                    return obj.x;
                },

                set(value) {
                    obj.x = value;
                },
            });
        </script>
    </body>
</html>
